1297408019 has 2 divisors, whose sum is σ = 1297408020. Its totient is φ = 1297408018.

The previous prime is 1297408009. The next prime is 1297408037. The reversal of 1297408019 is 9108047921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1297408019 - 2²⁴ = 1280630803 is a prime.

It is a super-2 number, since 2×1297408019² = 3366535135531008722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1297408009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648704009 + 648704010.

It is an arithmetic number, because the mean of its divisors is an integer number (648704010).

Almost surely, 2^1297408019 is an apocalyptic number.

1297408019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297408019 is an equidigital number, since it uses as much as digits as its factorization.

1297408019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 1297408019 is about 36019.5505107990. The cubic root of 1297408019 is about 1090.6670492667.

The spelling of 1297408019 in words is "one billion, two hundred ninety-seven million, four hundred eight thousand, nineteen".